Angular Motion 1

A set of flashcards based on key concepts, definitions, and formulas related to angular motion, useful for exam preparation.

What is the definition of angular motion?

when an athlete or an object spins, swings, twists, or rotates around an axis of rotation.

What is the difference between angular position and angular displacement?

Angular position refers to the orientation of a line with another line or plane, while angular displacement is the angle made between the final and initial position.

What is the formula relating linear velocity to angular velocity?

Linear velocity (v) = Angular velocity (ω) * radius (r).

What are the units used for angular displacement?

degrees or radians.

How many radians are there in a full circle?

6.28 radians

What is angular acceleration?

(α) is the rate of change in angular velocity, measured in degrees per second squared (°/s²) or radians per second squared (rad/s²).

What does centripetal acceleration refer to in angular motion?

(ar) is directed towards the center of rotation and is necessary for an object to maintain circular motion.

What is the relationship between moment of inertia and angular motion?

Moment of inertia (I) is an object's resistance to changes in its angular motion and depends on both mass and the distribution of mass around the axis of rotation.

What is the conservation of angular momentum?

(H) remains constant unless acted on by a net external torque.

What happens to angular speed when the moment of inertia of a body decreases?

If the moment of inertia decreases, angular speed increases, assuming angular momentum is conserved.

What is torque?

(ττ) is the rotational equivalent of force, causing an object to rotate or change its angular motion. It is calculated as the product of force and the perpendicular distance from the axis of rotation to the line of action of the force (τ=rFsin⁡θτ=rFsinθ).